The bus sports an air-cooled, flat-four engine with a supercharger that can get about 200 hp. You can see it here fully exposed in the back:

Ron described the entire process – from his original cartoon drawing to the real life vehicle – in these eight steps:

He hand-built the entire thing from steel, and with help from local Utah company SKJ Customs, the molding and trim were constructed of fiber glass, and then chrome plated. The wheelie bars, side windows, and sunroof are all motorized.

The result? A sweet custom ride that looks like it came right out of the Disney movie Cars: